A frog lived in a shallow well.
一只青蛙住在一口浅井里。
Place a clean dry folded piece of cheesecloth loosely over a bowl or a pitcher, and create a shallow well in the center.
将一片干净的干棉布折叠好松松地放在碗上或水罐上，在中间形成一个浅浅的窝。
There was once a frog who made his home in a shallow well. One day he met a turtle from the East Sea.
从前有只青蛙，在浅井里居住。一天，它遇见一只从东海来的大鳖。
Results Among all eight drinking-water types, drinking of shallow well water and river water were shown with higher exposure proportion and longer exposure period.
结果所有饮水类型中，浅井水和河水所占比例最高，平均饮用年限最长。
Results Among all eight drinking-water types, drinking of shallow well water and river water were shown with higher exposure proportion and longer exposure period.
结果所有饮水类型中，浅井水和河水所占比例最高，平均饮用年限最长。
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